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High Efficiency 5V, 10A Buck Regulator
ISL95210
The ISL95210 is a high-efficiency step-down regulator that can
deliver 10A of output current from a 5V input. The small
4mmx6mm QFN package and only four external components
provide a very small total solution size. Low resistance internal
MOSFETs deliver excellent efficiency and permit full power
operation in a +90°C ambient without airflow.
The regulator operates from an input voltage of 2.97V to 5.5V,
and provides a 0.6% accurate output voltage over the full
operating temperature range. Intersil's patented R4 control
architecture provides exceptional transient response with no
external compensation components. The output voltage may be
programmed by an internal DAC or by an external resistor divider
(see “Output Voltage Programming” on page 11 for more
details).
Several digital control signals provide flexibility for users that
want additional features. Switching frequency, switching mode,
output voltage margining and daisy-chained power-good
functions are all programmed by these pins. The ISL95210 also
includes comprehensive internal protection for overvoltage,
undervoltage, overcurrent and over-temperature conditions.
Related Literature
• See AN1485, “ISL95210 10A Integrated FET Regulator
Evaluation Board Setup Procedure”
VIN = 5V
CONTROL
SIGNALS
CIN
10µF
VCC
VIN
PVCC
EN
PG_IN
FSET
VSEL1
MPCT
MSEL
VSEL0
FCCM
PGOOD
PHASE
VOUT
VCC
AGND
PGND
T-PAD
LOUT
420nH
VOUT = 1.2V
COUT
220µF
FIGURE 1. 10A DC/DC CONVERTER USING ONLY 4 EXTERNAL
COMPONENTS
November 17, 2011
FN6938.3
ISL95210
FSW= 800kHz
1µF
+
POWER GOOD
LOUT = MPC0740LR42C (NEC/TOKIN)
COUT = 2TPLF220M5 (SANYO)
Features
• 10A Continuous Output Current
• 2.97V to 5.5V Input Voltage Range
• Up to 95% Efficiency
• Full Power Operation in +90°C Ambient without Airflow
• R4 Control Architecture Delivers Excellent Transient
Response Without Compensation
• Pin Selectable Output Voltage Programming
• ±0.6% Output Voltage Accuracy Over Full Operating
Temperature Range
• Programmable Enhanced Light-Load Efficiency Operation
• Output Voltage Margining and Power-good Monitor
• Small 6mmx4mm QFN Package
Applications
• Point-of-Load Power Supplies
• Notebook Computer Power
• General Purpose Power Rail Generation
EFFICIENCY (%)
100
95
90
85
80
75
70
65
Get the Datasheet and Order Samples
http://www.intersil.com
60
55
50
VIN = 5V
VOUT = 1.2V
FSW = 800kHz
0 1 2 3 4 5
IOUT (A)
6 7 8 9 10
FIGURE 2. EFFICIENCY OF CIRCUIT SHOWN IN FIGURE 1
(INCLUDES INDUCTOR LOSSES)
Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2011
All Rights Reserved. All other trademarks mentioned are the property of their respective owners.